The Numbers are just borderline irrelevant low tiers who aren’t fit to fight the SHs. Fighting them would be like fighting those 3 judges at Enies Lobby. Franky already one shot one of them without even using Shogun. Why would he fight another one? And who would the 6th SH fight since there’s only 5 Numbers? Franky, Brook, Robin, Nami, and Usopp beat Sasaki, Who’s Who, Maria, Ulti, and P1. Numbers 6 and 9 serve as hype tools for Apoo and Hawkins. Chopper either fights Numbers 1, 2, and 3, or he fights Perospero